Vania



(No Model.)

E. H. G. HARTMANN & A. MEEDOM. PRIGTION GLUTGH.

No. 442,3'74. Patented'Deo. 9, 1890.

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EMIL ll. C. IIARTMANN AND ANDRE\V MEEDOM, OF PHILADELPHIA, PENNSYL-VANIA, ASSIGNORS OF ONE-THIRD TO EDYVIN A. ROTI'I, OF SAME PLACE.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 442,374, dated December9, 1890.

Application filed March 24, 1890. Serial No. 345.137. (No model.)

To aZZ whom it may concern: On a screw-threaded portion orattachment RBe it known that We, EMIL H. O. I'IARTMANN of the shaft is a coilar S,having on one side and ANDREW MEEDOM, eitizens of the United a recessedportion Y, the walls of which fur- States, both residing in the city andcounty nish fixed bearings for said cams Q. A nut 55 of Philadelphia,State of Pennsylvania, have T on said threaded portion R ad j usts thepoinvented a new and useful Improvement in sition of the collar Sthereon, and to hold the Friction-Clutches,whichimprovementis fully saidcollar in place a clainping-serew U is set forth in the following;specification and employed, the said screw passing through anaceompanying drawings. opening V in the eollar and having its point 60IO Our invention relates to improvements in bearing on the saidattachinent or shaft. Befriction-clutches; and it-consi'sts, first,of anostween the cams Q and the hub I of the pulcillating eain or cams havingfixed bearings ley is a collar X, adapted to be moved endon the shaftfor moving the pulley into enwise on the shaft and having recesses Z ongagement with a fixed cone; second, of a colits side adjacent to thecams, the walls of the 65 lar mounted on a pulley-shaft and adapted tosaid recesses serving as bearings for said be moved by means of cams oreccentrics so cams. The recessed portions of the eollars S as to bearagainst the pulley and engage it and X also form a secure support forthe with a cone fixed on the shaft; third, of an adcams or eccentrics Qand the forked arm P. justable bearing, substantially as described, Itwill be notieed that the arms N and P form 7o on said shaft fo1` theOperating cain or cams. a toggle-lever, and that by placing the cams Itfurther consists of lthe combination of on opposite sides of the shaftadirect motion parts herein set forth. is imparted to the collar X, sothat it will Figure 1 represents a perspcctive View of a move freely onthe said shaft. friction-clutch embodying my inrention, the A'designates a collar Secured to the shaft 7 5 z 5 pulley and cone beingengaged. Fig. 2 rep- A, to limit the movement in one direction ofresents a centrai horizontal section of the dethe grooved collar .I onthe said shaft.

Vice shown in Fig. 1. The Operation is as follows: The parts be- Similarletters of reference indicate correing in position, as shown in Fig. l,the cone sponding parts in the two figures. Il. of the clutch mechanismbeing engaged So 3o Beferrng to the drawings, A designates a with thepulley, when it is desired to release rotary shaft having suitablebearin in the the said pulley, so that it will run loose on the hangersB. On the said shaft A is freely shaft, the handle end of the lever Mismoved inounted the pulley O, having a radially-proin a direction awayfrom the pulley, thus j eeting fiange D on one side of its rim E,formmoving the collar J and the arm N, so that 85 ing the walls of anOpening, the said walls the outer end of the forked arm P is moved beingtapering or oonical at their outer edge, toward the shaft, therebyoscillating the cams as at G, to correspond with the face of a cone Q,so that their shorter axes are in line of and II, which is rigidlysecured to the said shaft. between the collars S and X, and the saidFreely mounted on the shaft A is a collar collar X is notforced againstthe hub, thereby 90 40 J, in the groove K of which projects the pinsclamping the pulley against the cone, but or studs L of the lever M,which latter is pivleaves the said pulley free to rotate on the oted atone end toa suitable support. To an shaft A. If it now be desired toconnect the. ear or lug on the said collar J is pivotally sepulley andshaft so that they rotate together, cured one end of an arin N, theother end of the handle end of the lever is moved toward 95 the saidarin being pivotally fastened to one the pulley, pushing the collar Jand the arm end of a forked arm P, having the cams or N Vinward andInoving the outer end of the eecentries Q at the outer ends of the saidarm P from the shaft, thus partially rotating forks. Each of the cams isiu the form of a the cams Q, so that their longer axes are in diskhaving aXes of different lengths, and the line of and between the fixedcollar or bear- Ioo collar S has recessed portions F, the walls of ing Sand themovable collar X. This movewhich form stops for the forks of thea-rm P. ment forces the said collar X against the hub VV, so that thepnlley is brought in such close contact with the cone H so as to revolvethere- With. The adjustinent of the position of the fixed bearing oncollar S on the shaft A is accomplished by means of rotating the nut Ton the threaded atiachment or part R of the shaft, the clamping-screw Ubinding the collar in fixed position, as is evident.

Having thus described our invention, What We claim as new, and desire tosecure by Letters Patent, is

1. In a friction-c1ntch, a loosefpulley having a radially-projectingfiange, a shaft with a fixed cone thereon, a fixed collar on said shaft,and oscillating cams having bearing against said fixed collar andadapted to con-i tact With the hub of the pnlley, said parts beingcombined substantiall y as described.

2. In a friction-elntch, the combination of a loose pulley With sideOpening having conical Walls, a fixed cone having its periphery engagingsaid conical Walls of the Opening in the pulley, a Inovable collarbearing against the hub of the pulley, a fixed bearing, and a carn orcams located loosely between said fixed bearing and the Inovable collar,substantially as described.

3. A friction-clutch having a loose pnlley, a fixed cone against whichthe said pnlley is adapted to bear, a fixed bearing, an arm With a carnor cams, the latter between said fixed bearing and pulley, a collar Withan arrn pivotally attached thereto and to the cam-arm, and a pivotedlever adapted to move said collarV endwise on a shaft on which the saidparts are mounted, said parts being combined substantially described.

4. In a friction-clntch, the combination of a shaft, a fixed cone, and aloose pulley thereon, a fixed bearing With recessed side,` a movablecollar with recessed side, an arm with oscillating cam having bearingsin said recessed sides of the adjustable bearing, and the inovablecollar, substantially as described.V

In a friction-clutch, an adjustable bearing for an operating-cam,consisting of a shaft having a threaded portion, a collar on said shaftprovided With a set-bolt and reeesses, a nnt on said threaded portionand against said collar, and a sliding collar X, also having recesses,said parts being combined substantially as described.

EMIL H. O. HARTMANN. ANDREW MEEDOM.

Witnesses:

JOHN A. WIEDERSHEIM, L. JENNINGS.

